oil getting into my coolant system

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Texas Red

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Recently found a oil sheen in my coolant. I think it has to do with when i was installing a March alternator bracket system on my engine as I did not get enough sealer on the thread of the bolts or the incorrect sealer. I am not getting coolant into the oil so I suspect it is heating up hot oil is migrating to the coolant system around one of the bolts that hold everything together. The top 6 bolts that hold the timing case cover on needs sealer Nothing else looks out of place. Please advise Thanks in advance Texas Red.....
 
My one buddy had a 340 that was getting oil in the cooling system, but the oil was clean. He didn't drain the block over the winter, it froze and cracked in the valley. Oil pressure is more than coolant pressure. Another friend has atf in the cooling system from a bad trans cooler in the radiator. Just my experience
 
Possibly a leak on the intake manifold gasket. Coolant will dribble into the lifter valley. You can drain coolant (gonna have to anyway) and pressurize the cooling system with 20psi of air. Listen for the leak and spray soapy water around suspected leak locations (bolt heads).
 
don't think there are many places that oil can get into coolant
it would have to be pressurized ,and unless you have a oil cooler
are you sure the coolant didn't get contaminated
if not then need to pressurize the oil galley and see if you get bubbles in the rad (or with a pressure tester on the rad see if your building pressure )
if auto then its a trans cooler
 

Drivers side, second bolt up from the bottom. Could you have bottomed a bolt in that hole against the cylinder wall. I have seen this done on many engines. Just a thought since you added some accessories.
 
It could be transmission fluid through a cooler leak.
 
Thanks everyone for chiming in .... Going to make really sure the water pump mounting bolts are coated with sealer
putting the system all together. pressurize the cooling system dry ....let it sit a while with pressure on it as we know it should hold if the integrity of the system is good before putting coolant in it.
My trans cooler is separate from my radiator as a stand-alone system as I have seen that milky mess in a transmission on a fire truck at work once right after they rebuilt the transmission. It takes a lot of flushing to clean one back up.

Drivers side, second bolt up from the bottom. Could you have bottomed a bolt in that hole against the cylinder wall. I have seen this done on many engines. Just a thought since you added some accessories.
Thanks and yes ---- No accessories on the left side of the engine...... A quick check with a small screwdriver for depth was done on this bolt as you are correct its easy to do considering we scatter those engines into pieces (at least I do) but one of my practices from working with other experienced mentors of my past was tag N bag. One cannot get any better than this as the gallon size baggies give a person plenty of room for identification with a magic marker of what n where these bolts came from. At least this works for me .

As always I am blessed to be a very small part of a great group like this. I once wondered what it would be like to be able to have a family gathering of all the members with their cars there as at a track so we could get some passes in against one another for bragging rights but more of a brotherhood/sisterhood meeting get together. Probably never happen even though it still crosses my mind. have a blessed weekend everyone ........ Texas Red. Gary C.
 
Thanks everyone for chiming in .... Going to make really sure the water pump mounting bolts are coated with sealer
putting the system all together. pressurize the cooling system dry ....let it sit a while with pressure on it as we know it should hold if the integrity of the system is good before putting coolant in it.
My trans cooler is separate from my radiator as a stand-alone system as I have seen that milky mess in a transmission on a fire truck at work once right after they rebuilt the transmission. It takes a lot of flushing to clean one back up.


Thanks and yes ---- No accessories on the left side of the engine...... A quick check with a small screwdriver for depth was done on this bolt as you are correct its easy to do considering we scatter those engines into pieces (at least I do) but one of my practices from working with other experienced mentors of my past was tag N bag. One cannot get any better than this as the gallon size baggies give a person plenty of room for identification with a magic marker of what n where these bolts came from. At least this works for me .

As always I am blessed to be a very small part of a great group like this. I once wondered what it would be like to be able to have a family gathering of all the members with their cars there as at a track so we could get some passes in against one another for bragging rights but more of a brotherhood/sisterhood meeting get together. Probably never happen even though it still crosses my mind. have a blessed weekend everyone ........ Texas Red. Gary C.

You seem to have a real good handle on the mechanical stuff.
Did you know that coolant and water both dissolve the adhesive that holds the clutch friction material to the plates in transmissions.?
It does.
Weird huh?
 
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